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    • ACTIVATE Merged MODIS and MERRA-2 Dataset

    Metadata Updated: August 30, 2025

    ACTIVATE-MODIS-MERRA2 is the merged CERES MODIS and MERRA-2 dataset (pixel-level geostationary cloud products) produced by SatCORPS group at NASA Langley Research Center in support of ACTIVATE. ACTIVATE was a 5-year NASA Earth-Venture Sub-Orbital (EVS-3) field campaign. Marine boundary layer clouds play a critical role in Earth’s energy balance and water cycle. These clouds cover more than 45% of the ocean surface and exert a net cooling effect. The Aerosol Cloud meTeorology Interactions oVer the western Atlantic Experiment (ACTIVATE) project was a five-year project that provides important globally-relevant data about changes in marine boundary layer cloud systems, atmospheric aerosols and multiple feedbacks that warm or cool the climate. ACTIVATE studied the atmosphere over the western North Atlantic and sampled its broad range of aerosol, cloud and meteorological conditions using two aircraft, the UC-12 King Air and HU-25 Falcon. The UC-12 King Air was primarily used for remote sensing measurements while the HU-25 Falcon will contain a comprehensive instrument payload for detailed in-situ measurements of aerosol, cloud properties, and atmospheric state. A few trace gas measurements were also onboard the HU-25 Falcon for the measurements of pollution traces, which will contribute to airmass classification analysis. A total of 150 coordinated flights over the western North Atlantic occurred through 6 deployments from 2020-2022. The ACTIVATE science observing strategy intensively targets the shallow cumulus cloud regime and aims to collect sufficient statistics over a broad range of aerosol and weather conditions which enables robust characterization of aerosol-cloud-meteorology interactions. This strategy was implemented by two nominal flight patterns: Statistical Survey and Process Study. The statistical survey pattern involves close coordination between the remote sensing and in-situ aircraft to conduct near coincident sampling at and below cloud base as well as above and within cloud top. The process study pattern involves extensive vertical profiling to characterize the target cloud and surrounding aerosol and meteorological conditions.

    Access & Use Information

    Public: This dataset is intended for public access and use. License: No license information was provided. If this work was prepared by an officer or employee of the United States government as part of that person's official duties it is considered a U.S. Government Work.

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    Dates

    Metadata Created Date April 11, 2025
    Metadata Updated Date August 30, 2025

    Metadata Source

    Harvested from NASA Data.json

    Other Data Resources

    Additional Metadata

    Resource Type Dataset
    Metadata Created Date April 11, 2025
    Metadata Updated Date August 30, 2025
    Publisher NASA/LARC/SD/ASDC
    Maintainer
    Identifier 10.5067/ASDC/SUBORBITAL/ACTIVATE-MODIS-MERRA2_1
    Data Last Modified 2025-08-27
    Category Earth Science
    Public Access Level public
    Bureau Code 026:00
    Metadata Context https://project-open-data.cio.gov/v1.1/schema/catalog.jsonld
    Schema Version https://project-open-data.cio.gov/v1.1/schema
    Catalog Describedby https://project-open-data.cio.gov/v1.1/schema/catalog.json
    Harvest Object Id 6bc741ab-c030-4422-bd4f-44b83d4e7d73
    Harvest Source Id 58f92550-7a01-4f00-b1b2-8dc953bd598f
    Harvest Source Title NASA Data.json
    Homepage URL https://storymaps.arcgis.com/stories/851338f794274388bd5f3280eda55612
    Old Spatial "CARTESIAN",{"Boundary":{"Points":{"Latitude":0,"Longitude":-85},{"Latitude":0,"Longitude":-25},{"Latitude":60,"Longitude":-25},{"Latitude":60,"Longitude":-85},{"Latitude":0,"Longitude":-85}}}
    Program Code 026:000
    Source Datajson Identifier True
    Source Hash 100261a12da0de8666eec23f0053f34fbf7383cae21854f35015cc438b7707d0
    Source Schema Version 1.1
    Spatial
    Temporal 2013-01-01/2013-01-01

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